Which of the following must happen before the cell can go through mitosis? a. the spindle fibers must break down. b. the cell must copy its dna. c. the sister chromatids must separate. d. the cytoplasm must divide.

The response is the basis for vaccination. primary secondary tertiary none of the above

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.

How does the human body lever work?